abc's paula farris discovered the tricks of the trade for our series "real tty check." >> amazing infinityol. insane. how much better does it get? >> reporter: from the palaces of l.a. -- to the penthouses of manhattan, luxury living is back. and more expensive than ever. this month, mansions in los angeles and greenwich, connecticut, each sold for more than $100 million, shattering record. >> welcome to the famous billiard room. the fireplace mantle, hearst brought from a french chateau. >> reporter: this legendary beverly hills estate is available for any one with a spare $135 million. >> it is a very exciting time to be living, and it is like the dow jones, who knows how high it will go? >> reporter: a los angeles real estate broker who specializes in ultra-high-end homes. that is when he is not moonlighting on the "real housewives of beverly hills." >> good luck. >> reporter: his wife is housewife kyle richard. >> clients from europe, asia, china, singapore. >> reporter: all driving up prices. with demand high and inventory low, the u.s. housing market is on fire at all ends of the spe